The look of the screens perfectly mirrors what was seen in the film. You're given a command-line prompt to work with. Jackson's character Ray Arnold didn't get very far when he tried to use the system. You can try your own luck at a hack attack.
The control console only accepts five different commands, which consist of help, access, display, ls (for listing available files), and system. Try it out by typing in "system security" and you'll get a list of containment enclosures to reassure you that locations like the feeding pavilion are currently secure. This is important because you really don't want those velociraptors getting out.
After three failed access attempts, you get treated to the obnoxious taunts of fictional computer programmer Dennis Nedry in a crude Elvis costume endlessly repeating "You didn't say the magic word."
If you do everything correctly, you should find yourself yelling "I hate this hacker crap!" by the end of the simulation. Congratulations, your transformation into Samuel L. Jackson is now complete.